System and method for connecting and controlling wireless ultrasound imaging system from electronic device

ABSTRACT

An ultrasound imaging system comprising a multi-use electronic display device and an ultrasound imaging device. The multi-use electronic display device is capable of communicating with one or more ultrasound imaging devices and selecting which to connect with based on at least one of previously store information, user input, and information gathered from the ultrasound imaging devices. The multi-use electronic display device may communicate with the ultrasound imaging devices while they are in a low power standby state. This approach reduces the complexity of the pairing process and provides a means for quickly and easily selecting between multiple ultrasound imaging devices.

FIELD

This invention generally relates to ultrasound imaging systems. Inparticular, the invention relates to ultrasound imaging systemscomprising an ultrasound imaging apparatus and a multi-use electronicdisplay device, and to methods for communication between ultrasoundimaging apparatus and multi-use display devices.

BACKGROUND

Ultrasound imaging systems are an important tool for diagnosis andtherapy in a wide range of medical applications. Conventionally,ultrasound systems were large, expensive units used only in radiologydepartments by highly trained specialists. To improve portability andusability and enable ultrasound to be used at the point-of-care and bymore users, various attempts have been made to reduce the size and costof these systems and avoid the ergonomically troublesome cables that aretypically used to attach handheld transducers to processing hardware.

For example, U.S. Pat. No. 6,780,154 discloses a handheld medicaldiagnostic ultrasound imaging system that wirelessly communicatesultrasound data to a multi-use display device such as a commerciallyavailable PDA or tablet computer.

In addition to size and cost, wireless ultrasound systems may also facechallenges related to bandwidth and power. A high bandwidth is desirablein order to support high quality images and high frame rates. However,high bandwidth wireless connections typically have high powerconsumption, which can quickly drain the battery of a wireless imagingdevice.

Some applications, like emergency medicine, may be time-critical. Insuch applications, users may need to begin imaging without delay. Someultrasound systems can take a long time, on the order of 30-45 seconds,to boot up. It may not be practical for a battery-powered device toremain on when not in use. Wireless communication links generallyrequire some sort of initialization procedure in order to establishcommunication. This pairing process can take a long time and be prone toerrors, further delaying the start of imaging.

There remains a need for wireless ultrasound imaging systems that enableusers of multi-use display devices to connect to ultrasound imagingdevices quickly, easily, and securely. There is a particular need forsuch systems that provide multiple ultrasound imaging devices and allowusers to rapidly select and commence imaging using a selected one of theultrasound imaging devices.

SUMMARY

The description of the invention which follows, together with theaccompanying drawings should not be construed as limiting the inventionto the examples shown and described, because those skilled in the art towhich this invention pertains will be able to devise other forms thereofwithin the scope of the appended claims.

In accordance with one or more embodiments, a wireless ultrasoundimaging system comprises a multi-use display device and an ultrasoundimaging device. The multi-use display device is configured to acquireultrasound imaging device selection data from one or more ultrasoundimaging devices, select an ultrasound imaging device, direct theselected ultrasound imaging device to acquire ultrasound data, receivethe ultrasound data from the selected ultrasound imaging device anddisplay the ultrasound data.

One aspect provides an ultrasound imaging method. The method comprises,by a multi-use electronic display device: using a first wirelesscommunication protocol to acquire imaging device selection informationfrom each of one or more ultrasound imaging devices. The method selectsone of the one or more ultrasound imaging devices for use in anultrasound procedure based on the selection information. The method thenestablishes a primary wireless communication link with the selected oneof the ultrasound imaging devices according to a second wirelesscommunication protocol different from the first wireless communicationprotocol. The method commands the selected one of the ultrasound imagingdevices to acquire ultrasound image data. Subsequently, the methodreceives the ultrasound image data by way of the primary wirelesscommunication link; and displays the received ultrasound image data on ascreen of the multi-use electronic display device. The first wirelesscommunication protocol may, for example, comprise a Bluetooth protocol.

In some embodiments the method comprises, by the multi-use electronicdisplay device: determining from the selection information acontrollable function of the ultrasound imaging device; and in responseto determining the controllable function, configuring the multi-useelectronic display device to provide at least one user interface controlfor the controllable function.

In some embodiments the selection information comprises link informationfor each of the one or more ultrasound imaging devices and establishingthe primary wireless communication link with the selected one of theultrasound imaging devices comprises using the link information toestablish data communication between the multi-use display device andthe selected ultrasound imaging device according to the second wirelessdata communication protocol. The link information may include, forexample an address, name, ID or other information identifying theselected ultrasound imaging device. The link information may optionallyinclude other information useful for setting up the primary wirelesscommunication link such as encryption keys or other encryptioninformation, protocol information, etc.

In some embodiments the selection information comprises battery chargeinformation indicative of a state of charge of batteries of theultrasound imaging devices. In some embodiments the first wirelesscommunication protocol is a protocol that does not require theultrasound imaging devices to be powered. For example, the firstwireless communication protocol may comprise a Radio-frequencyidentification (RFID) protocol. In some embodiments the method comprise,at the multi-use electronic display device, determining the ultrasoundprocedure to perform on a patient and selecting one of the one or moreultrasound imaging devices comprises limiting the selection to those ofthe ultrasound imaging devices that possess an adaptation necessary forthe ultrasound procedure. The adaptation may comprise, for example oneor more of, a Doppler imaging mode or other special imaging mode; atransducer having a configuration required for the determined ultrasoundprocedure; a needle guide or other structural adaptation; a datatransceiver providing a desired bandwidth, etc.

In some embodiments selecting one of the one or more ultrasound imagingdevices comprises a filtering stage in which those of the ultrasoundimaging devices potentially suitable for the ultrasound procedure areidentified and a selection stage comprising, if more than one of theultrasound imaging devices are potentially suitable for the procedure,selecting one of the more than one of the ultrasound imaging devicesthat are potentially suitable for the procedure.

In some embodiments acquiring imaging device selection information fromeach of one or more ultrasound imaging devices is performed while someor all of the ultrasound imaging devices are in a low-power standbystate and the method comprises commanding the selected one of theultrasound imaging devices to switch to an active or power on state.

In some embodiments, the method comprises, by way of the first wirelesscommunication protocol commanding the selected one of the ultrasoundimaging devices to issue a human-perceptible visual or audible signal.The visual or audible signal may be used to locate the selectedultrasound imaging device or to distinguish the selected ultrasoundimaging device from other similar-looking ultrasound imaging devices. Insome embodiments the method comprises, before selecting one of the oneor more ultrasound imaging devices, displaying at the multi-use displaydevice at least some of the selection information for each of aplurality of the ultrasound imaging devices, the displayed selectioninformation including one or more of: type of an ultrasound transducertype of the ultrasound imaging device; nickname of the ultrasoundimaging device; battery state of charge of the ultrasound imagingdevice; and strength of signals in the first wireless communicationprotocol received at the multi-use display device from the ultrasoundimaging device.

The above-noted features may be combined in any combinations andsub-combinations to yield various non-limiting example embodiments.

Another aspect provides an ultrasound imaging system comprising anultrasonic imaging apparatus which wirelessly communicates with amulti-use electronic display device for display of ultrasound image dataacquired by the ultrasonic imaging device. The ultrasonic imagingapparatus comprises: an imaging unit operable to transmit ultrasoundenergy and acquire ultrasound data; a processor, coupled to andconfigured to control the imaging unit; a pairing unit, coupled to theprocessor and configured to establish a preliminary data connection withthe multi-use electronic display device; a communication unit, coupledto the processor and configured to communicate ultrasound image data tothe multi-use electronic display device. The processor is coupled to thefirst communication interface, imaging unit, and pairing unit and isoperable to receive imaging configuration data from the multi-useelectronic display device. The multi-use electronic display devicecomprises: an external interface configured to communicate with thecommunication interface and receive said transmitted ultrasound imagedata information, a second processor, configured to convert saidultrasound image data information into an ultrasound image, a memory,coupled to said second processor; and a user interface, coupled to thesecond processor and operable to display the ultrasound image.

In some embodiments the external interface comprises first and secondwireless transceivers and the communication unit comprises a thirdwireless transceiver, configured to form a first data connection withthe first wireless transceiver; and a fourth wireless transceiver,configured to form a second data connection with the second wirelesstransceiver. The first and second wireless transceivers may operateaccording to distinct communication protocols. In some embodiments,information for setting up said second data connection is communicatedvia the first data connection. In an example embodiment the firstwireless transceiver is provided by a Bluetooth module. In the exampleembodiment the second wireless transceiver may be provided by a Wi-Fimodule.

In some embodiments the ultrasound imaging device comprises a sensingunit. The sending unit may, for example, comprise one or more of aninertial measurement unit and a global positioning sensor. One or bothof the ultrasound imaging device and multi-use display device may bebattery powered portable devices.

In some embodiments, commanding the selected one of the ultrasoundimaging devices to acquire ultrasound image data comprises transmittingimaging parameters to the selected one of the ultrasound imaging devicesand the method comprises automatically establishing initial values f orthe imaging parameters at the multi-use imaging device based on theultrasound procedure.

Another aspect of the invention provides a diagnostic ultrasound imagingsystem. The diagnostic ultrasound imaging system according to thisaspect comprises a multi-use display device operable to wirelesslyconnect with at least one ultrasound imaging device. The multi-usedisplay device may comprise an off-the-shelf device such as a smartphone, tablet computer, personal digital assistant (PDA) or portablecomputer configured with software (e.g. an app) which provides functionsfor establishing a data connection to an ultrasound imaging device,receiving ultrasound image data from the ultrasound imaging device anddisplaying an ultrasound image on a display of the multi-use displaydevice. The multi-use display device may be operable for uses other thanultrasound imaging.

The multi-use display device comprises a processor, a user interface, amemory, and an external interface. The multi-use display device isoperable to wirelessly communicate with the ultrasound imaging devicethrough the external interface to configure imaging parameters andreceive ultrasound data.

In some embodiments, the external interface of the multi-use displaydevice may comprise one or more wireless transceivers that providewireless communications with other devices using a plurality ofdifferent wireless communication protocols.

In an example embodiment the ultrasound imaging device comprises aprocessor, an imaging unit, a pairing unit, a memory, and acommunication unit operable to connect with the multi-use displaydevice.

In some embodiments, the ultrasound imaging device may further comprisea sensing unit to generate ultrasound imaging device selectioninformation on the current state of the ultrasound imaging device.

In some embodiments, the ultrasound imaging device may operate in atleast a standby state and an active state. The ultrasound imaging devicemay consume less power in the standby state.

In some embodiments, the ultrasound imaging device is a handheld orhand-carried system. The ultrasound imaging device may be a laptop orcart-based system in the alternative.

Another aspect of the present invention provides a method for using amulti-use display device to wirelessly control and receive data from anultrasound imaging device. The method comprises: acquiring ultrasoundimaging device selection information from one or more ultrasound imagingdevices, selecting an ultrasound imaging device based on the pluralityof ultrasound imaging device selection information, establishingcommunication with the selected ultrasound imaging device, directing theselected ultrasound imaging device to acquire ultrasound data, receivingthe acquired ultrasound data from the ultrasound imaging device, anddisplaying the ultrasound data acquired by the ultrasound imaging deviceon the multi-use display device.

In some embodiments, the ultrasound imaging device selection informationmay comprise at least one of the following: information gathered fromone or more available ultrasound imaging devices, information from theuser, and previously stored information.

In some embodiments, the plurality of ultrasound imaging deviceselection information from one or more ultrasound imaging devices may beacquired while one or more of the ultrasound imaging devices are in astandby state. A selected one of the ultrasound imaging devices maysubsequently be transitioned from a standby state to an active state bya user control input or automatically. In some embodiments, the usercontrol input is received at the user interface of a multi-use displaydevice and software on the multi-use display device causes the multi-usedisplay device to transmit a signal to the ultrasound imaging devicethat causes the ultrasound imaging device to transition to the activestate.

In some embodiments an ultrasound device list may be generated based atleast in part on the ultrasound imaging device selection information.This list may also be displayed on multi-use display device 102.

In some embodiments, selecting an ultrasound imaging device may comprisereceiving an input from a user via a user interface on the multi-usedisplay device.

In some embodiments, selecting an ultrasound imaging device may comprisean automated step performed by the multi-use display device based on theplurality of pieces of ultrasound imaging device selection information.For example, the multi-use display device may be configured toautomatically select the closest ultrasound imaging device, orautomatically select the ultrasound imaging device that was previouslyconnected.

Another aspect of the invention provides ultrasound imaging devices asdescribed herein.

Further aspects and example embodiments are illustrated in theaccompanying drawings and/or described in the following description.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings illustrate non-limiting example embodiments ofthe invention.

FIG. 1 is a schematic diagram of an ultrasound imaging system accordingto an example embodiment of the present disclosure.

FIG. 2 is a process diagram that illustrating an operation of themulti-use electronic display device in the communication methodaccording to an example embodiment of the present disclosure.

FIG. 3 is a diagram illustrating a preliminary connection between anultrasound imaging device and multi-use display device and a primaryconnection via a wireless local area network according to an exampleembodiment of the present disclosure.

FIG. 4 is a diagram illustrating a preliminary connection between anultrasound imaging device and multi-use display device and a primaryconnection via a personal area network according to an exampleembodiment of the present disclosure.

FIG. 5 is a signal flow diagram illustrating signal flows betweendevices in the communication method according to an example embodimentof the present disclosure.

FIG. 6 is an example of a screen shown on the multi-use display deviceof FIG. 1.

FIG. 7 is an example of a screen shown on multi-use display device ofFIG. 1.

FIG. 8 is an example of a screen shown on multi-use display device ofFIG. 1.

FIG. 9 is schematic diagram of an example embodiment of the ultrasoundimaging system.

DETAILED DESCRIPTION

Throughout the following description, specific details are set forth inorder to provide a more thorough understanding of the invention.However, the invention may be practiced without these particulars. Inother instances, well known elements have not been shown or described indetail to avoid unnecessarily obscuring the invention. Accordingly, thespecification and drawings are to be regarded in an illustrative, ratherthan a restrictive sense.

Throughout the following description, a “target object” may be a targetinanimate object or a target animate object, which is displayed via animage. Also, the target object may be a part of a human body and mayinclude the liver, the heart, the womb, the brain, the breast, theabdominal region, or the like, a fetus, or a cross-section of a part ofthe human body. Throughout the following description, a “user” may be amedical expert including a doctor, a nurse, a medical laboratorytechnologist, a sonographer, or the like.

FIG. 1 is a schematic diagram of an ultrasound imaging system 100 inaccordance with an embodiment of the disclosure. Ultrasound imagingsystem 100 comprises a multi-use display device 102 and an ultrasoundimaging device 104.

A communication link 106 between multi-use display device 102 andultrasound imaging device 104 may be established. Multi-use displaydevice 102 may gather information about ultrasound imaging device 104 byway of link 106. Multi-use display device 102 may establishcommunication link 106 with one or more other ultrasound imaging devices104 (not shown in FIG. 1) and may obtain and use information about theultrasound imaging devices 104 to select among two or more ultrasoundimaging devices 104.

Ultrasound imaging device 104 may be wirelessly connected with multi-usedisplay device 102. Ultrasound imaging device 104 may transmit anultrasound signal to a target object according to a control signal thatis transmitted from multi-use display device 102.

Still referring to FIG. 1, multi-use display device 102 may comprise aprocessor 120, memory 124, user interface 120, and an external interface122. Processor 120 may be a general purpose CPU or may be a lowpower/mobile specific processor. Processor 120 is coupled with memory124. Memory 124 includes storage for program and program operating code.One or more programs 124A in memory 124 coordinates interactions ofmulti-use display device 102 with ultrasound imaging devices 104 asdescribed herein.

User interface 120 is coupled with processor 120 and may comprise boththe software and hardware components necessary to interface with a userof the multi-use display device. User interface 120 may comprisephysical input devices such as a touch-sensitive display screen,keyboard, microphone, or function buttons. User interface 120 mayfurther comprise output devices such as a color, grayscale, or black andwhite display screen, audio speaker/output, vibrating or LED indicators.

External interface 122 is coupled with processor 120 and providesconnectivity of multi-use display device 102 with ultrasound imagingdevice(s) 104 though communication link(s) 106. External interface 122may also be operable to communicate with another device, such as a webserver.

Processor 120 may generate control signals to control an operation ofultrasound imaging device 104 according to information that is providedvia user interface 126. The control signals may include control signalsthat control ultrasound imaging device 104 to generate ultrasoundsignals, and control signals that control how ultrasound imaging device104 handles transmission and reception of the ultrasound signal. Inaddition, processor 120 may control wireless communication withultrasound imaging device 104, and may control generation and display ofan ultrasound image on a display of user interface 126 based onultrasound image data provided from ultrasound imaging device 104.

Still referring to FIG. 1, ultrasound imaging device 104 may comprise aprocessor 140, memory 144, imaging unit 146, pairing unit 148, and acommunication unit 142. Processor 140 may comprise a general purposeCPU, a low power/mobile specific processor, a field programmable gatearray, a combination of two or more of these or the like.

Imaging unit 146 is operable to acquire ultrasound image data of atarget object based on control signals from processor 140. Imaging unit146 may comprise a transmitter for generating ultrasound energy and areceiver for receiving ultrasound energy reflected from the targetobject. Imaging unit 146 may further comprise an analog-to-digitalconverter for digitizing the received ultrasound energy into digitalultrasound data. Imaging unit 146 may further comprise one or morebeamformers to combine and focus the received ultrasound energy along adesired scanline. Imaging unit 146 may further comprise a signalprocessor to apply filtering or compression to the ultrasound imagedata. Imaging unit 146 may also comprise a scan converter for convertingthe ultrasound image data into a specific display format.

Processor 120 is coupled with memory 124. Memory 124 includes storagefor program and program operating code. One or more programs in memory124 coordinates the operation of ultrasound imaging device 104 asdescribed herein. Memory 124 may also be used to store information aboutultrasound imaging device 104 and/or ultrasound image data.

Pairing unit 148 is operable to establish communication link 106 betweencommunication unit 142 and external interface 122 of multi-use displaydevice 102. Communication unit 142 may comprise one or more wirelesstransceivers.

In some embodiments, ultrasound imaging device 104 may function in atleast a standby state and an active state. In the standby state, some ofthe internal subsystems of ultrasound imaging device 104 may be poweredand thus functional while others are powered down. For example, in thestandby state all subsystems may be powered down except for pairing unit148 and communication unit 142. In the standby state, ultrasound imagingdevice 102 is able conserve power, which may extend battery life. In theactive state, all subsystems of ultrasound imaging device 102 may bepowered. Ultrasound imaging devices 104 may be transitioned from astandby state to an active state by activating a control on theultrasound imaging device 104. Alternatively, ultrasound imaging devices104 may be transitioned from a standby state to an active state inresponse to a signal or command received through communication unit 142.

Ultrasound imaging devices 104 may have any of a wide range of varioussizes and configurations. For example, ultrasound imaging device 104 maybe handheld or hand carried. Alternatively, ultrasound imaging device104 may be in a laptop form factor or a more traditional cart-baseddevice. In some preferred embodiments, ultrasound imaging devices 104have the form of hand-held battery-powered probes.

Communication link 106 may comprise more than one communicationprotocol. In some embodiments, a first protocol is applied for initialdiscovery of an ultrasound imaging device 104 by multi-use displaydevice 102 as well as acquisition of data useful for selecting theultrasound imaging device 104 and information useful for establishing acommunications link according to a second protocol with the ultrasoundimaging device 104. The second protocol may provide a longer rangeand/or higher bandwidth connection than the first protocol.

For example, a preliminary connection may be a Bluetooth™ low energy(BLE) connection and a primary connection may be a Wi-Fi connection.Alternatively, one or more of the following protocols may be used:wireless local area network (LAN), Bluetooth, ZigBee™, Wi-Fi Direct(WFD), ultra wideband (UWB), infrared data association (IrDA), Bluetoothlow energy (BLE), near field communication (NFC), wireless broadbandinternet (Wibro), world interoperability for microwave access (WiMAX),shared wireless access protocol (SWAP), radio frequency (RF)communications and the like.

Once the desired ultrasound imaging device 104 is selected, thepreliminary connection may be operable to setup a primary connection forcommunication and data transfer between multi-use display device 102 andultrasound imaging device 104.

In some embodiments, software processes running on multi-use displaydevice 102 play a role in selection of an ultrasound imaging device 104.To give three examples, selection may be based on one or more of:capabilities of the ultrasound imaging device 104; proximity tomulti-use display device 102; and rights of a user of multi-use displaydevice 102. Selection may also be based on combinations of two or moreof these or other factors with one another.

In a first example, a user selects an ultrasound imaging procedure toperform. Not all of ultrasound imaging devices 104 are suitable for theprocedure. Multi-use display device 102 may display for selection onlythose available ultrasound imaging devices 104 that are suitable for theprocedure. This filtering may be based on information regarding theconfiguration and/or capabilities of the ultrasound imaging devices 104provided by way of preliminary connections to those devices.

As a second example, multi-use display device 102 determines distance toeach of ultrasound imaging devices 104 and sorts a list of availableultrasound imaging devices 104 by distance. Distance may be measured bymonitoring signal strength of signals from the ultrasound imagingdevices on the preliminary communication channel.

As a third example, different multi-use display devices 102 may haverights to access different ultrasound imaging devices. Some ultrasoundimaging devices may be available only to physicians. Others may beavailable only to members of a certain department. Others may beavailable only to certain individuals, and so on. Multi-use displaydevice 102 may use information obtained from the preliminary dataconnection to determine whether it is authorized for use with theultrasound imaging device 104 and may display for selection only thoseultrasound imaging devices 104 for which the multi-use display device102 is authorized.

In some embodiments, the preliminary protocol is a protocol that doesnot require the ultrasonic imaging device to be powered. For example,the preliminary protocol may comprise an RFID protocol. An RFID chip onthe ultrasonic imaging device 104 may contain information identifyingthe ultrasonic imaging device 104, describing capabilities of theultrasonic imaging device 104, and/or describing how to establish asecond (primary) data connection to the ultrasonic imaging device 104.In such embodiments, multi-use display device 102 may incorporate anRFID reader or system 100 may include a separate RFID reader with whichmulti-use display device 102 communicates by a suitable protocol, forexample Bluetooth.

FIG. 2 is a flowchart illustrating an operation procedure S200 of themulti-use electronic display device in the communication methodaccording to an embodiment of the present disclosure.

In operation S202, multi-use display device 102 acquires a plurality ofpieces of ultrasound imaging device selection information. The pluralityof pieces of information may be acquired from one or more ultrasoundimaging devices, from the user, or from memory 124.

In order to obtain ultrasound imaging device selection information fromone or more ultrasound imaging devices, multi-use display device 102 maysearch for ultrasound imaging devices 104 that are within range and mayestablish a preliminary connection with each of them.

In some embodiments, ultrasound imaging devices 104 advertise theirpresence. For example, communication unit 142 may include a BluetoothLow Energy module that is configured to periodically advertise thepresence of ultrasound imaging device 104. Upon reception of one ofthese advertisements, multi-use display device 102 may attempt toestablish a preliminary connection with ultrasound imaging device 104 inorder to request ultrasound imaging device selection information.Alternatively, the advertisements may also contain some or all of theultrasound imaging device selection information.

As part of the preliminary connection process, multi-use display device102 and/or ultrasound imaging device 104 may perform an authenticationstep. An authentication step may involve the exchange of credentials(e.g. username/pas sword or digital certificate information) betweenmulti-use display device 102 and ultrasound imaging device 104. In someembodiments, an authentication server, which may be network-based orcloud-based, mediates the authentication. The authentication step mayblock further execution of method S200 if the multi-use display device102 is not authorized to work with the ultrasound imaging device 104 orvice versa.

Ultrasound imaging device selection information received from anultrasound imaging device 104 may include at least one of identityinformation of the ultrasound imaging device, function information aboutthe ultrasound imaging device, and status information about theultrasound imaging device.

The identity information of the ultrasound imaging device may include auniversally unique identifier (UUID), a name determined by themanufacturer and/or a user-defined device name. For example, auser-defined device name could be “DrSeymourConvex”.

The function information about the ultrasound imaging device mayinclude, for example, one or more of the following: power information(e.g. state of charge of an onboard battery), transducer information, orimaging capabilities. Power information may include power type, such asline or battery or information on the battery. For example, batteryinformation may include type, capacity, state of charge, and/or anestimated life. Transducer information may include the geometry, such asconvex or linear, the number of elements, and the number of channels.Imaging capabilities may include available imaging modes such as B-Mode,M-Mode, Color Doppler, Power Doppler, and the like. Transducerinformation may also include physical features of the probe, such aswhether or not a needle guide is present.

The status information about the ultrasound imaging device may includeone of the following: connection state, boot state. For example, theconnection state may include the presence and/or identity of a differentmulti-use display device connected to the ultrasound imaging device. Theboot state may indicate the power state of the ultrasound imagingdevice, such as a standby state or an active state.

Multi-use display device 102 may also acquire ultrasound deviceselection information for ultrasound imaging device 104 based oncharacteristics of its connection to the ultrasound imaging device 104.For example, the strength of the wireless connection, or an estimate ofproximity based at least in part on the strength of the wirelessconnection.

In some embodiments, ultrasound imaging device 104 may compriseadditional sensors to report other status information such astemperature, orientation, or position. For example, an inertialmeasurement sensor may report the 3D orientation of the probe relativeto the ground. In another example, a global positioning sensor mayindicate the global position of the ultrasound imaging system.

In some embodiments, the ultrasound device selection information isretrieved from available ultrasound imaging devices 104 in two or moresteps. A first step may be used to identify those of ultrasound imagingdevices 104 that have a first characteristic. This first characteristiccould be a configuration or capability (e.g. transducer type oravailable imaging modes). Further ultrasound device selectioninformation could then be obtained via the preliminary data connectiononly for those available ultrasound imaging devices 104 that have thedesired characteristic (e.g. only those with curved transducers or onlythose capable of colour Doppler imaging or only those with at least 50%battery capacity, etc.).

Still referring to operation S202, multi-use display device 102 mayacquire ultrasound imaging selection information by receiving an inputfrom the user. For example, the user may request a particular type ofexam or a particular time of day they would like to perform an exam.This input may be received through user interface 126, for example byinput via a touchscreen or based on voice command.

Multi-use display device 102 may also acquire certain ultrasound imagingdevice selection information from memory 124. For example, informationspecifying which ultrasound imaging devices the user is authorized tooperate and which ultrasound imaging device was last used by the usermay be stored in memory 124.

In operation S204, multi-use display device 102 selects an ultrasoundimaging device based on the ultrasound imaging device selectioninformation acquired in operation S202. The selection may be based on aninput from the user received through user interface 126 or may beautomated.

Multi-use display device 102 may generate and display an ultrasoundimaging device list based on the plurality of pieces of ultrasoundimaging device selection information. The ultrasound imaging device listmay display identifiers (e.g. names, allocated numbers, allocatedletters or allocated symbols of the ultrasound imaging devices) thatcorrespond to the ultrasound imaging device, and the plurality of piecesof ultrasound imaging device selection information acquired in operationS202.

The ultrasound imaging device list may be filtered or ranked based onthe ultrasound imaging device selection information. For example, if theuser has indicated that an abdominal exam is desired, the ultrasoundimaging device list may display only ultrasound imaging devices with atransducer geometry suitable for abdominal examinations (e.g. convex).In another example, the ultrasound imaging device list may be ranked byphysical proximity. In yet another example, the ultrasound imagingdevice list may be ranked by estimated battery life. Combinations ofthese are also possible. One skilled in the art can envision thatvarious criteria could be used and/or combined to match the preferenceof the user.

Processor 120 may be configured to automate part or all of theselection. For example, if there is only one device on the ultrasoundimaging device list, processor 120 may be configured to skip displayingthe list to the user and proceed to the next step. Processor 120 mayalso be configured to automatically select an ultrasound imaging devicebased on predetermined or user-selectable criteria. For example,processor 120 may preferentially select the ultrasound imaging devicethat was used in a preceding session.

The ultrasound imaging device list may optionally provide a means forlocating or identifying a particular ultrasound imaging device. Forexample, multi-use display device 102 may receive an input from the userthrough user interface 126 for one or more of the ultrasound imagingdevices on the ultrasound imaging device list. In response to receivingthe input, multi-use display device 102 may transmit a page signal tothe corresponding ultrasound imaging devices via the preliminaryconnection. Upon reception of the page signal, the ultrasound imagingdevice may generate an indication for the user. The indication mayinclude a visible, audible, and/or tactile signal, such as a flashinglight, audible tone, or a vibration.

In operation S206, multi-use display device 102 establishes a primarycommunication channel with the ultrasound imaging device selected inS206.

Operation S206 may involve transmitting information to setup the primarycommunication channel through the preliminary communication channel. Forexample, information such as an SSID and a password to setup a WIFIconnection may be transmitted through a preliminary Bluetoothconnection.

As part of establishing communication to a particular ultrasound imagingdevice 104, multi-use display device 102 may transmit a signal to theultrasound imaging device selected in operation S204 to transition itfrom a standby state to an active state.

Operation S206 may additionally configure multi-use display device 102to work with the selected ultrasonic imaging device 104. Thisconfiguration may involve one or more of:

-   -   configuring multi-use display device 102 to perform any steps        required to further process for display ultrasound data to be        received from the ultrasound imaging device 104;    -   configuring user interface 126 to provide controls for the        various functions of ultrasound imaging device 104. Optionally,        only a subset of the available controls which are required for a        procedure specified by the ultrasound imaging device selection        information are initially displayed on multi-use display device        102;    -   sizing buffers to accommodate the expected ultrasound imaging        data;    -   configuring user interface 126 to display ultrasound images from        the selected ultrasound imaging device 104;    -   etc.

In operation S208, multi-use display device 102 transmits a controlsignal to the ultrasound imaging device selected in S204. The controlsignal may contain commands to set the selected ultrasound imagingdevice 104 into a particular imaging mode. For example, the commands maycontrol values for a number of imaging parameters that are to be used toacquire ultrasound data. In some embodiments initial values for theimaging parameters are set based on an ultrasound procedure to beperformed on a patient. The imaging parameters may comprise parametersthat relate to aspects of ultrasound imaging such as the nature ofultrasound signals to be transmitted (e.g. waveform, intensity,aperture, frequency, etc.); the nature of beamforming to be applied tothe transmit signals; the nature of beamforming to apply to receivedultrasound echo signals; the nature of processing to be applied toreceived ultrasound signals (e.g. gain, filtering etc.); the nature ofan image to acquire (e.g. number of scanlines, depth of scanlines,compounding, etc.).

In operation S210, multi-use display device 102 receives ultrasound dataacquired by the ultrasound imaging device in response to the controlsignal transmitted in operation S208.

In operation S212, multi-use electronic display device 102 displays theultrasound image data generated in operation S214 via user interface126.

Additional processing steps may be performed on the ultrasound data onmulti-use electronic display device 102 before it is displayed as animage. For example, the ultrasound data may be scan converted.

FIG. 3 is a diagram illustrating a preliminary connection betweenultrasound imaging device 104 and multi-use display device 102 and aprimary connection between the ultrasound imaging device 104 and themulti-use display device 102 via a wireless local area network. In thisembodiment, preliminary connection 310 is a Bluetooth connection andprimary connection 314 is a Wi-Fi connection. Multi-use display device102 establishes Bluetooth connection 310 with ultrasound imaging device104 within a personal area network 306. Multi-use display device 102 maythen transmit configuration information via Bluetooth to ultrasoundimaging device 104 in order to establish a Wi-Fi connection 314.

Configuration information to setup Wi-Fi connection 314 may comprise anSSID and a password. This configuration information may be encrypted.Alternatively, configuration information may comprise a reference topreviously stored information in ultrasound imaging device memory 144.

In some embodiments, communications between ultrasound imaging apparatus104 and multi-use display apparatus 102 are encrypted. In someembodiments, encryption is provided by the wireless protocol used forthe primary connection. For example, where the primary connection is aWi-Fi connection, the connection may be secured by WEP or WPA. In someembodiments, to ensure better security, ultrasound imaging device 104encrypts ultrasound image data using a separate encryption protocol andmulti-use display data 102 decrypts the ultrasound image data beforedisplaying it. In such embodiments, information regarding the encryption(such as a public key from multi-use display device 102) may beexchanged by way of the preliminary connection or by way of the primarydata connection.

FIG. 4 is a diagram illustration of a preliminary connection between anultrasound imaging device and multi-use display device and a primaryconnection via a personal area network. In this embodiment, preliminaryconnection 310 is a Bluetooth connection and primary connection 416 is aWi-Fi direct connection. In a similar fashion, Bluetooth connection 310is established first, and used to establish Wi-Fi direct connection 416.

FIG. 5 is signal flow diagram for an example procedure in whichmulti-use display 102 selects an ultrasound imaging device 104 andperforms wireless communication, according to an embodiment of thepresent disclosure.

At least one ultrasound imaging device 104 may be in a broadcast stateS500, and will periodically send a Bluetooth Device Advertisement signalin operation S504.

In operation S502, multi-use display device 102 initiates a discoveryprocess. If an advertisement signal is received, multi-use display 102transmits an Information Request signal (Information REQ) at operationS506. Ultrasound imaging device 104 then responds by transmitting anInformation Response signal (Information RES) in operation S508.

In operation S510, multi-use display device 102 transmits a BluetoothConnection Request signal (Bluetooth Connection REQ). If the signal isreceived, ultrasound imaging device 104 sends multi-use display device102 a Bluetooth Connection Response signal (Bluetooth Connection RES) atoperation S512. Then multi-use display device 102 and ultrasound imagingdevice 104 establish a Bluetooth communication channel at operationS514.

In operation S516, multi-use display device 102 generates an ultrasoundimaging device list from the information acquired during operation S508from one or more ultrasound imaging devices 104 and displays anultrasound imaging device list.

In operation S518, multi-use display device 102 select an ultrasoundimaging device from the list of ultrasound imaging devices. Thisselection may be based on an input received from user interface 126.

If the ultrasound imaging device 104 selected in operation S518 isdetermined to be in a standby state, multi-use display device 102 willsend a Boot Request signal (Boot REQ) at operation S520. Ultrasoundimaging device 104 then transitions from a standby state to an activestate in operation S522Te. When the boot process is complete, ultrasoundimaging device 104 transmits a Boot Response signal (Boot RES) inoperation S524.

In operation S526 multi-use display device 102 transmits Wi-Ficonnection information via the Bluetooth connection. In operation S28,multi-use display device 102 prepares for a Wi-Fi connection. Similarly,ultrasound imaging devices 104 prepares for Wi-Fi connection inoperation S530 and then transmits a Wi-Fi Connection Request signal(Wi-Fi Connect REQ) in operation S532. If multi-use display device 102receives the Wi-Fi Connection Request signal, multi-use display device102 transmits a Wi-Fi Connection Response signal (Wi-Fi Connection RES)in operation S534. Afterwards, multi-use display device 102 andultrasound imaging device 104 establish a Wi-Fi communication channel atoperation S536.

Next, in operation S538, multi-use display device 102 transmits imagingconfiguration information via the Wi-Fi communication channel. Ifultrasound imaging devices 104 receives the imaging configurationinformation, it prepares for imaging at operation S540.

In operation S542, multi-use display device 102 transmits a StartImaging Request signal (Start Imaging REQ). Ultrasound imaging devices104 sends a Start Imaging Response signal (Start Imaging RES) inresponse to the Start Imaging Request signal at operation S544. Thenultrasound imaging devices 104 starts imaging in operation S546.Ultrasound data is sent from ultrasound imaging devices 104 to multi-usedisplay device 102 multi-use display device 102 via the Wi-Ficommunication channel in operation S548.

In operation S550, multi-use display device 102 displays the ultrasounddata received from ultrasound imaging devices 104. The ultrasound datamay be displayed on user interface 126 or on a secondary display.

FIG. 6 illustrates an example of a screen that may be shown onultrasound imaging device 104 during selection operation S204 of FIG. 2.In this example, user interface 126 displays an ultrasound imagingdevice list comprising an ID indicator 610, a type indicator 612, astate indicator 614, a power indicator 616, and a page control 618 forultrasound imaging devices 104A-C. In this example, the ultrasoundimaging device list on the user interface shows that System A and SystemB are in a standby state, while System C is in an active state.

FIG. 7 illustrates an example of a screen that may be shown onultrasound imaging device 104 during selection operation S204 of FIG. 2in which an ultrasound imaging device is already connected to anothermulti-use display device. In this example, System A is already connectedso it is moved to the bottom of the list and marked as unavailable onthe user interface.

FIG. 8 illustrates an example of a screen that may be shown onultrasound imaging device 104 during selection operation S204 of FIG. 2in which the ultrasound imaging device list is ranked based on theproximity of the ultrasound imaging devices to multi-use display device102. In this example, System B is the ultrasound imaging devices withthe strongest signal and is displayed at the top of the list.

FIG. 9 illustrates an ultrasound imaging system in accordance withanother embodiment of the present disclosure. In this embodiment,ultrasound imaging device 104 further comprises a sensing unit 900 incommunication with processor 140. Sensing unit 900 is configured tomeasure ultrasound imaging device state information.

Sensing unit 900 may also comprise a battery monitor capable ofreporting at least one of the following: battery type, state of charge,estimated run-time, battery voltage, battery temperature, batterycurrent.

Sensing unit 900 may also comprise one or more environmental sensorssuch as an inertial measurement unit, an accelerometer, a compass, amagnetometer, temperature sensor, or a global positioning sensor.

In one embodiment, sensing unit 900 comprises a contact sensor able tosense when ultrasound imaging device 104 is in physical contact with apatient or user. For example, a capacitive touch sensor may sense whenthe transducer is being held by a user's hand.

An ultrasound imaging system that does not require a display or a userinterface can be much more cost effective than traditional ultrasoundmachines which include dedicated displays and extensive user interfaces.

The simpler and/or partially automated ultrasound imaging deviceselection process and simplified pairing process as described herein mayreduce the time required to start scanning and make the workflow easier.

The ability of a multi-user display device to acquire ultrasound imagingdevice selection information while the ultrasound imaging device is in alow-power standby state may help reduce power consumption and extendbattery life.

In an example use case, an ultrasound department in a hospital hasacquired a set of ultrasound imaging devices 104 as described herein.The ultrasound imaging devices 104 are of different types. In thisexample, some, but not all, of the ultrasound imaging devices 104incorporate colour Doppler imaging functions. Another difference betweenthe different ultrasound imaging devices 104 is that different ones ofthe ultrasound imaging devices 104 are equipped with different probes.Some of the ultrasound imaging devices 104 have general purpose linearor convex transducers. Others of the ultrasound imaging devices 104 havespecial-purpose probes such as probes specialized for trans-vaginalimaging. Others of the imaging devices may be equipped with hardwarefeatures such as guides for conducting needle biopsies. In this useexample, the hospital acquired ultrasound imaging devices 104 for a costsignificantly less than it would have cost to equip the ultrasoundimaging suite with conventional ultrasound imaging machines.

A number of ultrasound technicians work in the hospital. Each of theultrasound technicians has a tablet computer which runs an ultrasoundimaging application. Each of the ultrasound technicians has a fullcaseload and therefore must be efficient in going about their work. Whenultrasound devices 104 are not being used, they are normally stored in acharging dock so that their internal batteries may be kept charged. Asdifferent ultrasound imaging devices 104 are used in different amountsduring the day, different ultrasound imaging devices 104 may be atdifferent charge levels. These ultrasound imaging devices 104 that havenot been used very much or which have been on the charger for asufficient period of time will be fully charged or nearly fully charged.Others may be partially discharged. Others still may be nearing the endof their battery life.

As each ultrasound technician goes about his or her business, thesoftware on his or her tablet computer causes the tablet computer tointerrogate ultrasound imaging devices 104 by way of a preliminarycommunication channel, such as Bluetooth. Thus, each ultrasoundtechnician's tablet computer has, at any given time, information aboutthe available ultrasound imaging devices 104. When a technician isavailable to take a new patient, the technician can cause the softwareto display a list of the available ultrasound imaging devices 104. Thoseultrasound imaging devices 104 that are currently in use by somebodyelse or currently have very low levels of battery charge may be eitherexcluded from the list or marked as being unavailable. The ultrasoundtechnician may select one of the available ultrasound imaging devices104. The selection causes the ultrasound technician's tablet computer tocommence pairing with the selected ultrasound imaging device 104. Thepairing may establish a primary data connection such as a Wi-Fi wirelessconnection. If the selected ultrasound imaging device 104 is not in theplace where it should be, or if it is in the midst of one or more othervery similar looking ultrasound imaging devices 104, then the technicianmay, by activating a control on his or her tablet computer, cause theselected ultrasound imaging device 104 to identify itself.

In some cases the ultrasound technician may prepare for selecting anultrasound device 104 by operating software on the tablet computer toidentify a type of ultrasound procedure for which the next patient isscheduled. Information about the type of ultrasound procedure may beretrieved from a patient record or appointment booking system or enteredby the technician into the tablet computer. In some cases softwarerunning on the tablet computer provides a user interface which allowsthe user to select from among a number of predefined types of ultrasoundexamination. In such embodiments the selection step may includeidentifying those of available ultrasound imaging devices 104 that aresuitable for the selected type of ultrasound examination. The softwaremay suppress display of those ultrasound imaging devices 104 that arenot suitable for the selected type of ultrasound examination or in someother manner indicate their non-suitability.

Software on the multi-use display device determines an initial set ofimaging parameters to be used by the selected ultrasound imaging device.This initial set of imaging parameters may be predefined and associatedwith a selected predefined type of ultrasound examination. In someembodiments the imaging parameters are transmitted to the selectedultrasound imaging device before the ultrasound imaging device isinitialized (e.g. booted) and an initialization sequence of theultrasound imaging device configures the ultrasound imaging deviceaccording to the imaging parameters while the ultrasound imaging deviceis being initialized such that the ultrasound imaging device is alreadyconfigured according to the imaging parameters as soon as it hascompleted its initialization (e.g. as soon as it is booted up).

Having identified and taken the selected ultrasound imaging device 104,the technician proceeds to perform the desired ultrasound examination ofthe patient. By the time the ultrasound technician has reached thepatient's bedside, the pairing process has been completed, theultrasound imaging device has been configured with imaging parameterssuitable for the type of ultrasound examination to be performed and soultrasound examination can proceed without delay. Ultrasound data fromthe ultrasound imaging device 104 is provided to the technician's tabletcomputer. Ultrasound images may be stored on the tablet computer and/oruploaded to a server to be reviewed by a radiologist and/or stored in amedical record.

When the technician is done with the ultrasound imaging device 104, thetechnician may unpair the ultrasound imaging device with his or hertablet computer, for example, by activating a control on the tabletcomputer and may return the ultrasound imaging device to a chargingstation for later use.

In some embodiments, an ultrasound technician may know that he or shewill need to use a particular ultrasound imaging apparatus 104 in ashort while. Some embodiments permit the user to reserve the ultrasoundimaging device by inputting a command on his or her computer. The tabletcomputer may confirm the reservation to the ultrasound imaging device,for example, by way of the preliminary communication link. Theultrasound imaging device itself may record the reservation request andstart a countdown timer for a reservation time. For example, the systemmay be set up to allow ultrasound technicians to reserve ultrasoundimaging devices 15 minutes in advance only. When such a reservation hasbeen made, the ultrasound imaging device 104 may communicate thereservation information to other multi-use display devices 102 (e.g. thetablet computers of other technicians) such that the other technicianscan see that the particular ultrasound imaging device 104 has beenreserved and optionally by whom. These communications are made by way ofthe preliminary data connection in some embodiments.

Although it is not mandatory, it is convenient that multi-use displaydevices 102 may be provided by standard off-the-shelf hardware such assmart phones or tablet computers which are customized by the addition ofapplication software having functions for interacting with ultrasoundimaging devices 104 and displaying ultrasound images as describedherein. It is also convenient and cost effective but not mandatory forultrasound imaging devices 104 to have no user interface or only minimaluser interfaces.

While the above description contains many specifications, these shouldnot be construed as limitations on the scope of any embodiment, but asexemplifications of various embodiments thereof. Many otherramifications and variations are possible within the teachings of thevarious embodiments.

Thus the scope should be determined by the appended claims and theirlegal equivalents, and not by the examples given.

Interpretation of Terms

Unless the context clearly requires otherwise, throughout thedescription and the claims:

-   -   “comprise”, “comprising”, and the like are to be construed in an        inclusive sense, as opposed to an exclusive or exhaustive sense;        that is to say, in the sense of “including, but not limited to”;    -   “connected”, “coupled”, or any variant thereof, means any        connection or coupling, either direct or indirect, between two        or more elements; the coupling or connection between the        elements can be physical, logical, or a combination thereof;    -   “herein”, “above”, “below”, and words of similar import, when        used to describe this specification, shall refer to this        specification as a whole, and not to any particular portions of        this specification;    -   “or”, in reference to a list of two or more items, covers all of        the following interpretations of the word: any of the items in        the list, all of the items in the list, and any combination of        the items in the list;    -   the singular forms “a”, “an”, and “the” also include the meaning        of any appropriate plural forms.

Words that indicate directions such as “vertical”, “transverse”,“horizontal”, “upward”, “downward”, “forward”, “backward”, “inward”,“outward”, “vertical”, “transverse”, “left”, “right”, “front”, “back”,“top”, “bottom”, “below”, “above”, “under”, and the like, used in thisdescription and any accompanying claims (where present), depend on thespecific orientation of the apparatus described and illustrated. Thesubject matter described herein may assume various alternativeorientations. Accordingly, these directional terms are not strictlydefined and should not be interpreted narrowly.

Embodiments of the invention may be implemented using specificallydesigned hardware, configurable hardware, programmable data processorsconfigured by the provision of software (which may optionally comprise“firmware”) capable of executing on the data processors, special purposecomputers or data processors that are specifically programmed,configured, or constructed to perform one or more steps in a method asexplained in detail herein and/or combinations of two or more of these.Examples of specifically designed hardware are: logic circuits,application-specific integrated circuits (“ASICs”), large scaleintegrated circuits (“LSIs”), very large scale integrated circuits(“VLSIs”), and the like. Examples of configurable hardware are: one ormore programmable logic devices such as programmable array logic(“PALs”), programmable logic arrays (“PLAs”), and field programmablegate arrays (“FPGAs”)). Examples of programmable data processors are:microprocessors, digital signal processors (“DSPs”), embeddedprocessors, graphics processors, math co-processors, general purposecomputers, server computers, cloud computers, mainframe computers,computer workstations, and the like. For example, one or more dataprocessors in a control circuit for a device may implement methods asdescribed herein by executing software instructions in a program memoryaccessible to the processors.

While processes or blocks are presented in a given order, alternativeexamples may perform routines having steps, or employ systems havingblocks, in a different order, and some processes or blocks may bedeleted, moved, added, subdivided, combined, and/or modified to providealternative or sub-combinations. Each of these processes or blocks maybe implemented in a variety of different ways. Also, while processes orblocks are at times shown as being performed in series, these processesor blocks may instead be performed in parallel, or may be performed atdifferent times.

In addition, while elements are at times shown as being performedsequentially, they may instead be performed simultaneously or indifferent sequences. It is therefore intended that the following claimsare interpreted to include all such variations as are within theirintended scope.

Certain aspects of the invention may also be provided in the form of aprogram product. The program product may comprise any non-transitorymedium which carries a set of computer-readable instructions which, whenexecuted by a data processor, cause the data processor to execute amethod of the invention. Program products according to the invention maybe in any of a wide variety of forms. The program product may comprise,for example, non-transitory media such as magnetic data storage mediaincluding floppy diskettes, hard disk drives, optical data storage mediaincluding CD ROMs, DVDs, electronic data storage media including ROMs,flash RAM, EPROMs, hardwired or preprogrammed chips (e.g., EEPROMsemiconductor chips), nanotechnology memory, or the like. Thecomputer-readable signals on the program product may optionally becompressed or encrypted.

In some embodiments, some aspects of the invention may be implemented insoftware. For greater clarity, “software” includes any instructionsexecuted on a processor, and may include (but is not limited to)firmware, resident software, microcode, and the like. Both processinghardware and software may be centralized or distributed (or acombination thereof), in whole or in part, as known to those skilled inthe art. For example, software and other modules may be accessible vialocal memory, via a network, via a browser or other application in adistributed computing context, or via other means suitable for thepurposes described above.

Where a component (e.g. a software module, processor, assembly, device,circuit, etc.) is referred to above, unless otherwise indicated,reference to that component (including a reference to a “means”) shouldbe interpreted as including as equivalents of that component anycomponent which performs the function of the described component (i.e.,that is functionally equivalent), including components which are notstructurally equivalent to the disclosed structure which performs thefunction in the illustrated exemplary embodiments of the invention.

Specific examples of systems, methods and apparatus have been describedherein for purposes of illustration. These are only examples. Thetechnology provided herein can be applied to systems other than theexample systems described above. Many alterations, modifications,additions, omissions, and permutations are possible within the practiceof this invention. This invention includes variations on describedembodiments that would be apparent to the skilled addressee, includingvariations obtained by: replacing features, elements and/or acts withequivalent features, elements and/or acts; mixing and matching offeatures, elements and/or acts from different embodiments; combiningfeatures, elements and/or acts from embodiments as described herein withfeatures, elements and/or acts of other technology; and/or omittingcombining features, elements and/or acts from described embodiments.

It is therefore intended that the following appended claims and claimshereafter introduced are interpreted to include all such modifications,permutations, additions, omissions, and sub-combinations as mayreasonably be inferred. The scope of the claims should not be limited bythe preferred embodiments set forth in the examples, but should be giventhe broadest interpretation consistent with the description as a whole.

What is claimed is:
 1. An ultrasound imaging method comprising: amulti-use electronic display device using a first wireless communicationprotocol to acquire imaging device selection information from each ofone or more ultrasound imaging devices capable of transmitting andreceiving ultrasound energy; the multi-use electronic display deviceselecting one of the one or more ultrasound imaging devices capable oftransmitting and receiving ultrasound energy, for use in an ultrasoundprocedure based on the selection information; the multi-use electronicdisplay device establishing a primary wireless communication link withthe selected one of the ultrasound imaging devices capable oftransmitting and receiving ultrasound energy, the establishing beingperformed according to a second wireless communication protocoldifferent from the first wireless communication protocol; the multi-useelectronic display device commanding the selected one of the ultrasoundimaging devices to acquire ultrasound image data based on transmittedand received ultrasound energy; the multi-use electronic display devicereceiving the ultrasound image data by way of the primary wirelesscommunication link that is established according to the second wirelesscommunication protocol different from the first wireless communicationprotocol used to acquire the imaging device selection information; andthe multi-use electronic display device displaying the receivedultrasound image data on a screen of the multi-use electronic displaydevice.
 2. A method according to claim 1 comprising, by the multi-useelectronic display device: determining from the selection information acontrollable function of the ultrasound imaging device; in response todetermining the controllable function, configuring the multi-useelectronic display device to provide at least one user interface controlfor the controllable function.
 3. A method according to claim 1 whereinthe selection information comprises link information for each of the oneor more ultrasound imaging devices, and establishing the primarywireless communication link with the selected one of the ultrasoundimaging devices comprises using the link information to establish datacommunication between the multi-use electronic display device and theselected ultrasound imaging device according to the second wireless datacommunication protocol.
 4. A method according to claim 1 wherein theselection information comprises battery charge information indicative ofa state of charge of batteries of the ultrasound imaging devices.
 5. Amethod according to claim 1 wherein the first wireless communicationprotocol is a protocol that does not require the ultrasound imagingdevices to be powered.
 6. A method according to claim 5 wherein thefirst wireless communication protocol comprises a Radio-frequencyidentification (RFID) protocol.
 7. A method according to claim 1comprising, at the multi-use electronic display device, determining theultrasound procedure to perform on a patient wherein selecting one ofthe one or more ultrasound imaging devices comprises limiting theselection to those of the one or more ultrasound imaging devices thatpossess an adaptation necessary for the ultrasound procedure.
 8. Amethod according to claim 7 wherein the adaptation comprises a Dopplerimaging mode.
 9. A method according to claim 7 wherein the adaptationcomprises a transducer having a configuration required for thedetermined ultrasound procedure.
 10. A method according to claim 7wherein the adaptation comprises a needle guide.
 11. A method accordingto claim 1 wherein the selection information includes information forestablishing the primary wireless communication link with the selectedultrasound imaging device and the wireless communication with theselected ultrasound imaging device by a second wireless communicationprotocol different from the first wireless communication protocol.
 12. Amethod according to claim 1 wherein the multi-use electronic displaydevice is selected from a group consisting of: a smartphone, a laptopcomputer, and a tablet computer.
 13. A method according to claim 1wherein the selection information includes charge level informationindicative of states of charge of batteries in the one or moreultrasound imaging devices, and selecting one of the one or moreultrasound imaging devices is based at least in part on the charge levelinformation.
 14. A method according to claim 1 wherein selecting one ofthe one or more ultrasound imaging devices comprises a filtering stagein which those of the one or more ultrasound imaging devices potentiallysuitable for the ultrasound procedure are identified, and a selectionstage comprising, if more than one of the one or more ultrasound imagingdevices are potentially suitable for the procedure, selecting one of themore than one of the one or more ultrasound imaging devices that arepotentially suitable for the procedure.
 15. A method according to claim14 wherein the selection information includes charge level informationindicative of states of charge of batteries in the ultrasound imagingdevices and the filtering stage comprises selecting those of the one ormore ultrasound imaging devices for which the state of charge has atleast a threshold value.
 16. A method according to claim 14 comprisingdetermining at the multi-use electronic display device a proximity ofeach of the one or more ultrasound imaging devices based on signalsreceived by the multi-use electronic display device from the one or moreultrasound imaging devices according to the first wireless communicationprotocol, and the selecting one of the one or more ultrasound imagingdevices is based at least in part on the proximities of the one or moreultrasound imaging devices to the multi-use electronic display device.17. A method according to claim 1 wherein acquiring imaging deviceselection information from each of the one or more ultrasound imagingdevices is performed while some or all of the one or more ultrasoundimaging devices are in a low-power standby state, and the methodcomprises commanding the selected one of the ultrasound imaging devicesto switch to a power on state.
 18. A method according to claim 1comprising, by way of the first wireless communication protocol,commanding the selected one of the ultrasound imaging devices to issue ahuman-perceptible visual or audible signal.
 19. A method according toclaim 1 wherein the first wireless communication protocol comprises aBluetooth protocol.
 20. A method according to claim 1 comprising, beforeselecting one of the one or more ultrasound imaging devices, displayingat the multi-use electronic display device at least some of theselection information for each of the one or more ultrasound imagingdevices, the displayed selection information including one or more of:type of an ultrasound transducer type of the ultrasound imaging device;nickname of the ultrasound imaging device; battery state of charge ofthe ultrasound imaging device; and strength of signal in the firstwireless communication protocol received at the multi-use electronicdisplay device from the ultrasound imaging device.
 21. A methodaccording to claim 1 wherein commanding the selected one of theultrasound imaging devices to acquire ultrasound image data comprisestransmitting imaging parameters to the selected one of the ultrasoundimaging devices, and the method comprises automatically establishinginitial values for the imaging parameters at the selected one of theultrasound imaging devices based on the ultrasound procedure.
 22. Aultrasound imaging system comprising: one or more ultrasound imagingdevices capable of transmitting and receiving ultrasound energy; and amulti-use electronic display device configured to: using a firstwireless communication protocol, acquire imaging device selectioninformation from each of the one or more ultrasound imaging devicescapable of transmitting and receiving ultrasound energy; select one ofthe one or more ultrasound imaging devices capable of transmitting andreceiving ultrasound energy, for use in an ultrasound procedure based onthe selection information; establish a primary wireless communicationlink with the selected one of the ultrasound imaging devices capable oftransmitting and receiving ultrasound energy, the establishing beingperformed according to a second wireless communication protocoldifferent from the first wireless communication protocol; command theselected one of the ultrasound imaging devices to acquire ultrasoundimage data based on transmitted and received ultrasound energy; receivethe ultrasound image data by way of the primary wireless communicationlink that is established according to the second wireless communicationprotocol different from the first wireless communication protocol usedto acquire the imaging device selection information; and display thereceived ultrasound image data on a screen of the multi-use electronicdisplay device.
 23. A computer readable medium storing instructions forperforming a method of ultrasound imaging, wherein when the instructionsare executed by one or more processors of a multi-use electronic displaydevice, the one or more processors are configured to: using a firstwireless communication protocol, acquire imaging device selectioninformation from each of one or more ultrasound imaging devices capableof transmitting and receiving ultrasound energy; select one of the oneor more ultrasound imaging devices capable of transmitting and receivingultrasound energy, for use in an ultrasound procedure based on theselection information; establish a primary wireless communication linkwith the selected one of the ultrasound imaging devices capable oftransmitting and receiving ultrasound energy, the establishing beingperformed according to a second wireless communication protocoldifferent from the first wireless communication protocol; command theselected one of the ultrasound imaging devices to acquire ultrasoundimage data based on transmitted and received ultrasound energy; receivethe ultrasound image data by way of the primary wireless communicationlink that is established according to the second wireless communicationprotocol different from the first wireless communication protocol usedto acquire the imaging device selection information; and display thereceived ultrasound image data on a screen of the multi-use electronicdisplay device.